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(DataFlex) Working with PEM Encrypted Private KeysDemonstrates how to load and save PEM encrypted private keys. Note: This example requires Chilkat v11.0.0 or greater.
Use ChilkatAx-win32.pkg Procedure Test Boolean iSuccess Handle hoPem String sPemPassword Handle hoFac String sPemText Integer i Integer iNumPrivateKeys Variant vPrivKey Handle hoPrivKey String sTemp1 Integer iTemp1 Move False To iSuccess // This example assumes the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. Move False To iSuccess Get Create (RefClass(cComChilkatPem)) To hoPem If (Not(IsComObjectCreated(hoPem))) Begin Send CreateComObject of hoPem End Move "secret" To sPemPassword // To load a PEM file containing encrypted private keys, simply // provide the password. Get ComLoadPemFile Of hoPem "/Users/chilkat/testData/pem/pemContainingEncryptedPrivateKeys.pem" sPemPassword To iSuccess If (iSuccess = False) Begin Get ComLastErrorText Of hoPem To sTemp1 Showln sTemp1 Procedure_Return End Get Create (RefClass(cComCkFileAccess)) To hoFac If (Not(IsComObjectCreated(hoFac))) Begin Send CreateComObject of hoFac End Get ComReadEntireTextFile Of hoFac "/Users/chilkat/testData/pem/pemContainingEncryptedPrivateKeys.pem" sPemPassword To sPemText // To load a PEM from a string, call LoadPem instead of LoadPemFile: Get ComLoadPem Of hoPem sPemText To iSuccess If (iSuccess = False) Begin Get ComLastErrorText Of hoPem To sTemp1 Showln sTemp1 Procedure_Return End // A few notes: // The PEM may contain both private keys and certificates (or anything else). // The password is utilized for whatever content in the PEM is encrypted. // It is OK to have both encrypted and non-encrypted content within a given PEM. // PEM private keys can be encrypted in different formats. The LoadPem and LoadPemFile // methods automatically handle the different formats. // One format is PKCS8 and is indicated by this delimiter within the PEM: // -----BEGIN ENCRYPTED PRIVATE KEY----- // MIICoTAbBgkqhkiG9w0BBQMwDgQIfdD0zv24lgkCAggABIICgE0PdHJmRbNs6cBX // ... // Another format, we'll call "passphrase" looks like this in the PEM: // -----BEGIN RSA PRIVATE KEY----- // Proc-Type: 4,ENCRYPTED // DEK-Info: DES-EDE3-CBC,A4215544D11C5D0C // // paqy9XRexcSjurHfG0xhCaUD0HrvIdhuC0CbRxxxeMlkLaV6+uT80rBxt2AaibWG // ... // Show the bit length of each private key: Get ComNumPrivateKeys Of hoPem To iNumPrivateKeys If (iNumPrivateKeys = 0) Begin Showln (("Error: Expected the PEM to contain private keys.")) Procedure_Return End Get Create (RefClass(cComChilkatPrivateKey)) To hoPrivKey If (Not(IsComObjectCreated(hoPrivKey))) Begin Send CreateComObject of hoPrivKey End For i From 1 To iNumPrivateKeys Get pvComObject of hoPrivKey to vPrivKey Get ComPrivateKeyAt Of hoPem (i - 1) vPrivKey To iSuccess Get ComBitLength Of hoPrivKey To iTemp1 Showln i ": " iTemp1 " bits" Loop End_Procedure |
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